Flora of Guatemala / Paul C. Standley and Louis O. Williams.

v.24:pt.8:no.4(1969)

Flora of Guatemala / Paul C. Standley and Louis O. Williams.

v.24:pt.8:no.1-2(1966)

Hoffmannias from Mexico and Central America [by] Louis O. Williams.

v.36:no.6(1973)

Tropical American plants, XVII / Louis O. Williams.

v.36:no.10(1975)

Bignoniaceae of tropical North America [by] Louis O. Williams.

v.36:no.4(1973)

Tropical American plants, XII / Louis O. Williams.

v.34:no.8(1972)

Ornithological notes from Point Barrow, Alaska, by Louis B. Bishop.

v.29:no.12(1944)

Album of Abyssinian birds and mammals / From paintings by Louis Agassiz Fuertes.

Fieldiana Zoology Special Handbooks

The Thelephoraceae of North America.

13-15

The Thelephoraceae of North America.

1-7